The actress, 28, has already been through so much at such a young age after finding fame as a child star. But her time in jail is one of the worst experiences of her life, she reveals in a rare TV interview.
In July 2010, the Freaky Friday star was taken into custody in Los Angeles to serve a jail sentence for probation violation.
After being handcuffed, she was sent to a women's prison south of the city after appearing before a court.
Now, on The Jonathan Ross Show, she reveals that she was in solitary confinement for 14 days.
Describing the experience, she says: "You leave your cell for one hour a day and you don't go outside and I don't think anyone knows that but the other girls in the other cells were in there for murder…
"They [the Prison Officers] said it was for 'safety purposes'. I said, 'what am I going to do? I made a mistake, I went to a club and then I drank and I drove home and that's not the right thing to do, but to put someone in that position, it was very scary.
'The weirdest part for me was I finally had silence in my life… As terrified as I was and as scared as I was, I finally felt like I didn't have to answer to anyone and I didn't have to do anything for anyone."
The one-time singer also reveals she is single and not looking for a relationship, and admits leaving Los Angeles for London - where she is currently starring in David Mamet's play Speed-the-Plow - has been good for her.
Discussing her past and her unusual upbringing, she says: "I don't think you could ever blame it on anyone else but yourself. I grew up in a very tumultuous family and acting is therapy for me…
"When I lost that outlet, it kind of just snapped and I didn't know what to do. People are usually going to uni or college at that time, but I didn't have that experience."
See Lindsay Lohan, Russell Brand, Rio Ferdinand and Daniel Radcliffe on The Jonathan Ross Show, Saturday 25 October at 10.10pm on ITV1.
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